Light-projecting apparatus



W. A. PENNOW ETAL LIGHT PROJECTING APPARATUS Jan. 25, 1927. 1,615,552`

Filed May 14, 1925 Q xm,

s sneets-sneet ll Jan. Y

25 1927 w. A. PENNow ET AL LIGHT PROJEGTING APPARATUS Filed May 14, 1925 3 Sheets-Sheet 2 Jan. 25 1927.

W. A. PENNOW ET AL LIGHT PROJECTING APPARATUS Filed May 14, 1.925 3 Sheets-Sheet 5 Patented Jan. 25, 192.7.

UNITED STATES WILLIS A. PENNOW ANDRALPH s. HAYiSIEs, or MILWAUKEE, "WIsooNs-IN, AssIeNoRs To PERFECTION Amico. INC., A CORPORATIONOF WISCONSIN.

LIGHT-PROJECTING APPARATUS.

Application filed May 14, '1925. serial No.` 30,279.

` This invention relatesto a light projectinga'pparatus.

In devicesot this nature for projectingthe light from an electric arc and for adjusting the members of the mechanism, difficulty yhas. `been experienced due to't-he clogging ot the mechanism by material dis- 'charged from the arc with the final result thattheLmechanism.gummed up and gave a great dealA of trouble. In addition to this, `inmechanisms ofjthis type it isfthe usual practice to :start'the arc by adjusting the mechanism which requires a-subsequent resetting of the electrodes.

This invention is designed'to overcome the above-noteddefects, and objects of kthe invention are tofprovide alight vprojecting apparatus'in which an 'electric arc is employed, and in whichthe parts are so positioned that material discharged from the arc will yfall clear of ythe mechanism and consequently such mechanism will not become clogged.

Further objects are to provide a light projecting apparatus in which the arc may be struck without altering the adjustment of the parts, Vand in which a very simple and vquicklyoperatedholder is employed Jfor each of theelectrodes l Further objects are to provide anadjustingmechanism in'which the exact relative ,position of the electrodes may be most easily controlled, inr which the electrodes may be mechanically fed by motor or similar means, if desired, or may be manually fed, and in which -means are provided for bodily adjusting -`the position of a `reflector and also for adjusting its angularsetting to the exact needsoi"` the'occasion. j L

, An-embodiment-of the inventionis shown in the accompanying drawings, in which Figure 1 is an elevation of the appara- -tus with `parts in section to more `clearly show theconstruction. y

, Figure L2 is a plan view of the structure shown -in Figure 1.

Figure 3 is a sectional view on the line 3 3 of Figure l. j

Figure ,4lis a sectional view `on the line of Figure 1. j

YFigure 5 is a detail of one of the electrode holding means.

The projecting apparatus comprises a. pair of yend frames 1 and 2 which are rigidly joined `by means "ot bolts 3 and l which clamp -the end members yin relative fposi't-ion and furnish slides or guiding rods 5 and 6,

respectively, itbein'g understood'that these rods may have reduced threaded endsormay be spacers carried upon bolts.

An elongated screw 7 is'revolubly carried in tllie'end 'frames andis provided with reve'rsely threaded 'portions S and 9. This screw is adapted to be rotated by means oi' the hand wheel 10 or by means of the worm wheel-11,"such'worm wheel being in frictional engagement with'the shaft to per- Init thelro'tatio'n of the, hand wheelrrespective ofthe-rotation'of'the worm wheel. For example, the, wormwheel may bear against a collar, and may be forced 4into contact therewithby means of a spring '12. This worin wheelmay be drivenby aworm 13 vcarried by a motor driven shaft 14, ifdesired, ,such shaft being rotated 'at a relativelyrlw constant speed to -automaticallj7 myovethe electrodestowards each other.

Thefthre'aded portion 8 advances a carriage 15 whichfsupports the 'electrode 16, suchelectrode being clamped between a stationary jaw "17 rigidly secured to the 'can ruige,A as shown 1n Figure 5, and a movable jaw 18 ypivoted to the stationary jaw, and urged upwardly bymeans of a'spring 19 I"located o'n ythe outersideoi1 the carriage 15. lThe carriage is -preferably formed of insulating materialfor its major portion, as indicatedinthe sectional view of Figure 5. Obviously, the electrode 16 may be quickly replaced by depressi'ng'the outer end of the by the threaded portion 9 of the screw.

'lhe vertical rods 123 are spaced apart, as shown most clearly 1n Figure 1, and-a verytically movableblock orcarriage 24 is'guided thereon (see Fig. 3). This block 24- `is provided witha rack 2b, as shown'in Figure 3, which is engaged by av pinion 26 carried upon a rearwardly extending manually rotatable shaft 27, such shaft being .provided with a hand wheel 28, as shown in Figures 1 and 2. The block or vertically adjustable carriage 24 is provided with a pair of outwardly extending rods 29 (see Figures l and 2) upon which a laterally adjustable carriage or block 30 is slidably mounted. This block carries the electrode receiving member 3l which is preferably insulated therefrom. This electrode receiving member is in effect a block and slidably carries a. metallic sleeve 32 which in turn carries the electrode 33. It is to be noted from Figure l that the block 3l is slotted and receives a pin 34 secured to the sleeve 32.

The sleeve 32 is provided with a collar 35 at its outer end and a helical spring 36 is provided to hold the sleeve normally retracted with the pin or screw 34 in the outer end of the elongated slot 37 in the block al. It is to be noted that the forward portion of the sleeve is cut away to provide a lower lip 32 within which the electrode 33 rests. A clamping jaw 38 is pivotally mounted upon this portion of the sleeve and is provided with a rearwardl7 extending arm 3S) which is urged upwardly by means of a spring, as indicated at 40 in Figure l, thus permitting quick renewal of the electrode by depressing the arm 39 against the action of the spring. Y

The means for controlling the lateral adjustment: of the carriage 30 may comprise a rack 4l, as shown in Figures l and 2. This jacl; meshes with a pinion 42 rigidly carried by a manually adjustable shaft 43. This shaft is provided with a hand wheel 44 at its rear end.

An annular reflector 45 surrounds the electrode 53y and is carried by a composition ring 46 preferably formed of asbestos or similar material as its main ingredient. However, this ring is supported at three points. As shown in Figure 2, the ring 46 is recessed and receives a reduced portion of a shaft 47 such reduced portion being provided with a screw 43 which retains a washer in contact with the bott-oni of the recess in the ring 46.

It is to be noted that the shaft 47 is screw threaded through an outwardly and upwartfb ly extending arm 48 of a carriage 49. Further, this shaft is provided with a rear hand wheel 50 for its manipulation. A shaft 5l is screw threaded through a laterally projecting arm 52 integral with the carriage 49, as shown in Figures 2 and 3, and is 'joined to the ring 46 in the manner described for the shaft 47, and is provided with a rear adjusting` hand wheel 53. A.' short fixed shaft 54 (see Figure 4) is rigidly attached to the carriage 49 and is connected to the ring 46 in the same manner as the shaft 47.

It is to be noted that each of the three shafts 47, 5l and 54 are provided with helical springs 55 which are positioned. between the ring 46 and the arms of the carriage 49` thus urging the ring outwardly although pern'iitting rocking motion thereof with reference to the shafts the fitting between the shafts and the ring` is relatively loose. Thus it will be seen that the ring isvsupported at three points as is apparent from an examination of Figures l and 4 and by suitably adjusting the hand wheels 50 and 53 the exact tilt or angular setting of the reflector 45 may be most easily secured. The carriage 49 is provided with an aperture therethrough which is internally threaded and cooperates with the threaded portion 56 of a shaft 57, such shaft being provided with a rear manipulating hand wheel 58. The lower end of the carriage 49 is guided by the rod 5, L s may be seen from Figures l and 4.

ln operating the apparatus, it is merely necessary to press the sleeve 32 (see Figure l) inwardly against the action of the spring 3G to strike the are without requiring any alteration in the setting of the electrodes Obviously, when the pressure is reduced the electrode 33 is moved rearwardly until the pin 34 contacts with the rear end of the slot 37. Thereafter, the electrodes may be fed toward each other by rotating the hand wheel l0 or by driving the shaft i4 in any suitable manner, rotation of the shaft 7 causing simultaneous motion of the two electrodes. The exact vertical or horizontal position of the electrode with reference to the electrode 1G may be most readily secured by adjusting the hand wheels 28 and 44.

It is intended in the operation of this machine that a crater be formed upon the electrode 16 and that the major portion of the light be projected rearwardly against the refiector 45. This reflector 45 maybe advanced or retracted by rotating the hand wheel 458 until the exact position is secured. Thereafter, the exact angular setting of the re- Hector 45 may he secured by rotating the hand wheels 50 and 53. If the angular sotting of the .retlecter has been secured it is not necessary to alter it although the re- (lector may be advanced or retractedby rotation of the hand wheel 58.

It is preferable to use a small electrode for the rear electrode 33 and a larger one for the forward electrode 16.

It will he seen that a light projecting apparatus has been provided which will prevent clogging of the mechanism by falling portions of the material at the arc, which may be most easily adjusted to strike the are `without altering the setting of the apparatus, and which is provided with easily controlled adjustments for controlling the horizontal or vertical relative position of the electrodes and also their spacing apart.

It will be seen further that easily controlled means are provided for advancing or retracting the reflector and for securing the exact angular setting thereof desired.

It is to be noted further that the appa- QTE ll l) ratus is relatively simple although adapted for the accurate adjustments of its parts, as described above.

Obviously, each of the hand Wheels may be made of insulating material if desired.

Although the invention has been described in considerable detail, it is to be understood that the invention may be variously embodied and is, therefore, to be limited only as claimed. V

We claim: l. A light projecting apparatus comprising a pair of horizontal electrodes, an annular reflector surrounding one of said electrodes, and mechanism for adjusting the relative position of said electrodes and of said reflector with reference to said electrodes, said mechanism being located Wholly to the side of said electrodes, whereby material falling from said arc Will fall vclear of said mechanism.

2. A light projecting apparatus comprising a pair of horizontal electrodes for forming an arc, an annular reflector surrounding one of the electrodes, remote controlled means for tilting the reflector into any desired angular position, a carriage supporting said reflector, and means for, advancing and retracting said reflector, each of said means projecting from the rear of the apparatus.

3. A light projecting apparatus comprising a pair of horizontal electrodesl for forming an arc, an annular reflector surrounding one of the electrodes, means for tilting the reflector into any desired angular position, a carriage supporting said reflector, means for advancing and retracting said reflector, said tilting means engaging said reflector at spaced points, and a member carried by said carriage and engaging said reflector at a point spaced from said first mentioned points.

4. A light projecting apparatus comprising a pair of horizontal electrodes, a reflector, a carriage for advancing and retracting said reflector, a pin fixed to said carriage and supporting said reflector, and a pair of elongated shafts adjustable from the rear of the machine for movably supporting the reflector at points spaced from said pin, said carriage and said shafts being located to the side of said electrodes.

5. A light projecting apparatus comprising a pair of horizontal electrodes, a reflector, a carriage for advancing and retracting said reflector, a pin fixed to said carriage and supporting said reflector, and a pair of elongated shafts adjustable from the rear of the machine for movably supporting the reflector at points spaced from said pin, said carriage and said shafts being located to the side of said electrodes.

In testimony, that We claim the foregoing We have hereunto set our hands at Mil- Waulee, in the county of Milwaukee and State of Wisconsin.

WILLIS A. PENNOW. RALPH S. HAYNES. 

